Merge r1225476:

Don't use #ifdef inside macro calls

The behavior is undefined according to C99 6.10.3.11 and it breaks with
xlc on AIX

PR: 52394


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1225477 13f79535-47bb-0310-9956-ffa450edef68